I know everyone raves about Oil of Oregano but have never tested high for it so I never tried it, if it's an anti-viral it can't hurt.
Certainly I would be pushing the ozone as much as I can. Maybe bubble it through some Olive oil in a deep container. Great if you have organic but if you don't then let the first 30+40m burn off into an exhaust fan, after that you can breathe the stuff coming from the OO.
It's actually not O3 - Ozone anymore the O3 - Ozone burns the OO (Olive-Oil) and turns it into some 10 character long chemical chain. This is extremely beneficial to breath and if you keep it up for a few hours you can use it as rejuvenating skin lotion :)
Coconut oil orally for fungus and other critters wouldn't hurt either.